Concrete form



H. o. DAVIDSON. CONCRETE FORM. APPLICATION FILED NOV. 13, 1916.

Patented Aug. 17, 1920.

UNITED sTATss PATENT Noifi-icif'.

HARRY o. DAVIDSON, or CLEVELAND, onro, AssIGNoR To Tim HYDRAULIC rRRssED STEEL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CONCRETE FORM.

Specification of Letters Patent.

Application filed November 13, 1916. Serial No. 130,945.

To all iii/ioni, 'it may concern Be it known that l, HARRY 0. .llAvinsoN, a citizen ot the United States, residing at Cleveland, in the county ol' Cuyahoga and State ot IOhio, have invented a certain new and uselul Improvement in (fonerete l`orn'is, oll which the following is a full, clear, and exact descrilgition, re'lerenee being had to the accoinpanying drawings.

This invention relates to concrete forms, and more particularly to forms which are employed for supporting concrete Ytrom beneath until it sets or hardens and which will give to the under surface of such conH crete the desired contour after the forms have been removed. ln constructing the floors et brii'lges and buildings, it has heretofore been the practice to temporarily support the concrete between horizontally extending beanie until it has setor hardened sulii'cieiitly, and thereafter `to remove the supports..` As this operation is ordinarily performed, wooden or metal plates or forms are interposed between the flanges at the bottoms of' adjacent beams, being supported from beneath by platforms and jacks, necessitetiiig the removal of both the lorms and their supporting ine-.ins alter the concrete has set or hardened. In constructing these floors in accordance with my invention, I eiiiijiloy light metal sheets of the proper shape, of suilicient strength merely to carry the weight of the superposed concrete and of the workmanwlio tamps and levels the material, the plates being provided with flanges which enable them to be supported upon the flanges ot the beams;` and these plates are let't in place until they have so rusted or oxidized as to drop out or permit their convenient removal. ln actual operation this has resulted in a great saving of labor and expense in the installation of such floors.

It is the general purpose and object ot this invention to provide a temporary support for concrete floors of the character described which shall be extremely efficient for thepurposes set forth and which shall. be convenient of installation and economical of production. Il realize this object in and through the construction of floor supporting plates illustrated in the d `awings `forming part hereof wherein Figure 1 represents a transverse sectional view through a concrete "atented Aufl. 17, 1920.

floor temporarily supported by my lloor plates; Fig. 2 a vertical sectional view coi'- responding to the line 2*.2 of Fig. 1 and looking' in the direction o'l1 the 3 a perspective view ol one of l'iortii'ig plates; liig. 4

arrows; liig. iiiy floor sup a sectional detail illustrating a slightly inodil'ied `Foi-iii of suoli plate; and l* ig. :i `a similar View ol a still further modification.

i Describing by reference characters the various paits illustrated herein, l, 2 and de note longitudinal beams of a bridge, the

beams 2 and 3 supporting alloor 4 Vfor the use off pedestrians and the beams l supporting thereupon the .rails 5 The beams l and 2 supl monolithic floor 6.

olA a track for cars.

`)ort the concrete or supporting the wet concrete between the beams l, I employ a sullicient number of sheet metal plates 7, each sheet providing a suitably shaljied arch (preferably a continu-- ous curved surface) extending frointl'ie bottom flange of one I-beani to the bottom flange oi? the opposite Lbeam. At each end the plate i' is provided with a flange 8 which .is so shaped as to rest uponl the flange l of an I-beani and with an upturned ilange 9 which is z dapted tobear against the web of suoli beam, the sheet being so shaped and proportioned that a continuous arch is formed between the opposed edges of the flanges la.

llecause of the ifaet that the tire lateral extent from beam to beam but Without interfering with the seat which is provided between each flange 8 and the eeoperating I-beani flange.

that `each corrugation terminates at the lt will be observed flange 8 and does not extend tliereinto and that it extends continuously across the plate from flange to flange.

This enables the flanges Sto fit snugly on top of the I-beain flanges, and this practically eliminates leakage beneath the'tlanges while the concrete is in its wet condition7 nia-king a practically Vwater-tight'joint againstv the passage ot such moisture. The provision olf the llanges 9 also cooperates in securing this result as well as to prevent lateral displacement of the plates. Y

It is intended that the plates 7 shall overlap and, to facilitate this overlapping and at the same time to strengthen the temporary floor support at the joints thus formed7 the corrugations l1 will be provided a short distance within the lateral edges of the plate. In overlapping the plates, the edge ot the corrugations ll forms a convenient gage for an overlapping plate and forms a stop for an underlapping plate, as will clearly ap pear from Fie. 2. Y

ln Figs. l anda I have shown in detail a modification of the plate hereinbefore described and. which modification will be eniployed where a plate of less than full width is used,y as where the space between a pair of I-beanis is less than such 'tull width.l ln this case, the distance between the beanis l and 2 is less than the distance between the beams l. The plate'l' will be of the saine curvature from the I-beam 1 as is the, case in the form hereinbeiore described. However, because oit `the fact that it is of less widthr` the end which. is opposite the Yllangc 8 will be especially shaped to cooperate with its V support-shown 'in this case as an angle iron l2. The body ofA the sheet 7rL is merely extended, as indicated at 8, to provide a liangc resting upon the angle iron and forming a f substantially water-tight joint therewith.

Thecorrugations l0a and ll will extend from the flange 8fL to the edge ot the hori- Zontal flange ot the I-beam but will not rest thereupon.

ln Fig. I have shown a still tur her modification of the plate, wherein the dan; 9 are omitted.

The concrete licor-supporting torni whici is herein provided possesses the 'following advantages j (a) It may be easily installed trom above, thus dispensing with the use of plat'torins or ladders.

(b) It is entirely supported trom the floor beams and possesses sullicient strength in itself to carry the load, thus eliin' iating the use ot jacks, platforms, or other supporting devices.

(c) A substantially water-tight connection is provided between its lateral edges and the beams whereby practically no liquid concrete material will leak therearound during the drying or setting stage.

(d) The cost oi the plates is inconsiderable as compared with the expense of setting up and removing the forms which have universally been employed heretofore toithe purpose ot supporting concrete llooring.

(le) Having :i close seat between the plate llangcs and the benin [langes provides a solid l aring tor the concrete floor on the benin flanges.

Having thus described iny invention. what I claim is l. As a new article ot manutaeture. an arched sheet metal licor plate having a substantially lat llange at ea lh end thereot and provided with two corrugations extending thereacibss between but not including said flanges7 one oli said corrugatunis being lo cated adjacent to a lateral edge ol said plate.

2. As a new article ol inanulhetnre. an arched sheet metal Iloor plate having :i llange at each edge thereo't and provided with corrugations extendingl thereaero-1-v and between but not including 4.said flanges, oin` of said corrugations being located adjacent to a lateral edge ot said plate.

3. As a new article of nianutac-ture. a sheet metal plate having at eaeh end thereot a substantially tlat llangc adapted to seat upon and torni a substantially water-tight joint with the ilange ot a lloor supporting beam and having outside ot each ogt the tirs-t1 mentioned flanges a flange adapted to bear against the web oll such beam.

4. An arched sheet metal lloor-snpporting plate having at at least one edge thereof a substantially i'lat 'llange adapted to rest upon 'the [lange olf a ioor supporting benin and having a corrugat-ion extending thereaeross :is fa as but not including` said llange. said corrugation being located adjacent to n lateral e lge ot said* plate.

5. A concrete llooi' supporting lorin coin prising a plurality ot arched sheet inetal plates cach plate being` provided with substantially l'lat llanges adapted to rest upon thc flanges of the lloor supporting beains.y cach plate having two corrugations extending thereacross between but not including the flanges thereof, one ot said corrngations being located adjacent to a lateral edge ot said plate and the plates behind overlapped whereby a continuous lloor support will be formed. Y I

(3. A concrete lloor supporting t'orin eoinprising a plurality ot arched inetal plates each having at at least one edge` thereolA a flange and each having two corrugat'ions extending thereacross as l'ar as said llange. one oi said corrugations being` located adjacent to a lateral edge. ot its plate and thc plates being overlapped uf'hereby the, corrugation at the lateral edge ot each plate inayreoiipcrate with the corrugation ot an adjacent plate to provide a continuous tlooi; support.

ln testimony whereolf, l. lwreunto allix iny signature.

HARRY O. DAVIDSON.

lltl 

